From patchwork Wed Jul 26 14:58:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Zhangjin Wu X-Patchwork-Id: 706798 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5D1D4C0015E for ; Wed, 26 Jul 2023 14:58:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234300AbjGZO6l (ORCPT ); Wed, 26 Jul 2023 10:58:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234303AbjGZO6i (ORCPT ); Wed, 26 Jul 2023 10:58:38 -0400 Received: from bg4.exmail.qq.com (bg4.exmail.qq.com [43.155.65.254]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C52322109; Wed, 26 Jul 2023 07:58:34 -0700 (PDT) X-QQ-mid: bizesmtp80t1690383504t6indi1o Received: from linux-lab-host.localdomain ( [61.141.78.189]) by bizesmtp.qq.com (ESMTP) with id ; Wed, 26 Jul 2023 22:58:23 +0800 (CST) X-QQ-SSF: 00200000000000D0X000000A0000000 X-QQ-FEAT: 3M0okmaRx3gx1YD2Y2f418atJWwTGw4XT79+ZSinD1pcTvQdp5vp8yaZAPG+u 1dIO2RbMGkkhE3rpPrhTRe8MgIaCw8FPcA7QKZA+3UoqASQn50CYyKkYfKj8corHE2bYiJ4 eZ5R32XDCRLR9jJRb7Lpk5WsLdMhTcjw8Pf44ZYWJRfBUWXXjwUkj/viXBJmwL7i9WxornL VG6ITcNFaZOYzjgScvBG55cKoGz0B67RU1ySgAhU8t4w73cvXq/n2VioN83mwCEeaEvoGci vv7KwRuaFtHXrCaIVA9YNeRT7opgR2ixS1w+vAf96+EM1+yhBMQW2sP4OMxC8aOaC0/oxbm FZehGxrsrPsSk/QtgDnXG2VROmYHV6dXBAD4Siw1707Ovyf/+UQr0mZmbCKu4brxTRMwMu8 X-QQ-GoodBg: 0 X-BIZMAIL-ID: 18102331507296563561 From: Zhangjin Wu To: w@1wt.eu Cc: falcon@tinylab.org, arnd@arndb.de, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, thomas@t-8ch.de, =?utf-8?q?Thomas_Wei?= =?utf-8?q?=C3=9Fschuh?= Subject: [PATCH v2 7/7] selftests/nolibc: add test support for ppc64 Date: Wed, 26 Jul 2023 22:58:18 +0800 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 X-QQ-SENDSIZE: 520 Feedback-ID: bizesmtp:tinylab.org:qybglogicsvrgz:qybglogicsvrgz5a-1 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Here adds test support for big endian 64-bit PowerPC. The powernv machine of qemu-system-ppc64 is used with powernv_be_defconfig. As the document [1] shows: PowerNV (as Non-Virtualized) is the “bare metal” platform using the OPAL firmware. It runs Linux on IBM and OpenPOWER systems and it can be used as an hypervisor OS, running KVM guests, or simply as a host OS. Kernel uses ARCH=powerpc for both 32-bit and 64-bit PowerPC, here adds a ppc64 variant for big endian 64-bit PowerPC, users can pass ARCH=ppc64 to test it. Notes, - differs from little endian 64-bit PowerPC, vmlinux is used instead of zImage, because big endian zImage [2] only boot on qemu with x-vof=on (added from qemu v7.0) and a fixup patch [3] for qemu v7.0.51: - since the VSX support may be disabled in kernel side, to avoid "illegal instruction" errors due to missing VSX kernel support, let's simply let compiler not generate vector/scalar (VSX) instructions via the '-mno-vsx' option. - as 'man gcc' shows, '-mmultiple' is used to generate code that uses the load multiple word instructions and the store multiple word instructions. those instructions do not work when the processor is in little-endian mode (except PPC740/PPC750), so, we only enable it for big endian powerpc. [1]: https://qemu.readthedocs.io/en/latest/system/ppc/powernv.html [2]: https://github.com/linuxppc/issues/issues/402 [3]: https://lore.kernel.org/qemu-devel/20220504065536.3534488-1-aik@ozlabs.ru/ Reviewed-by: Thomas Weißschuh Signed-off-by: Zhangjin Wu --- tools/testing/selftests/nolibc/Makefile | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/testing/selftests/nolibc/Makefile b/tools/testing/selftests/nolibc/Makefile index cd46b97983a4..b751e9fdf30d 100644 --- a/tools/testing/selftests/nolibc/Makefile +++ b/tools/testing/selftests/nolibc/Makefile @@ -22,6 +22,7 @@ XARCH := $(or $(XARCH_$(ARCH)),$(ARCH)) # ARCH is supported by kernel # map from user-input variant to kernel-supported ARCH_ppc = powerpc +ARCH_ppc64 = powerpc ARCH_ppc64le = powerpc override ARCH := $(or $(ARCH_$(XARCH)),$(XARCH)) @@ -33,6 +34,7 @@ IMAGE_arm64 = arch/arm64/boot/Image IMAGE_arm = arch/arm/boot/zImage IMAGE_mips = vmlinuz IMAGE_ppc = vmlinux +IMAGE_ppc64 = vmlinux IMAGE_ppc64le = arch/powerpc/boot/zImage IMAGE_riscv = arch/riscv/boot/Image IMAGE_s390 = arch/s390/boot/bzImage @@ -48,6 +50,7 @@ DEFCONFIG_arm64 = defconfig DEFCONFIG_arm = multi_v7_defconfig DEFCONFIG_mips = malta_defconfig DEFCONFIG_ppc = pmac32_defconfig +DEFCONFIG_ppc64 = powernv_be_defconfig DEFCONFIG_ppc64le = powernv_defconfig DEFCONFIG_riscv = defconfig DEFCONFIG_s390 = defconfig @@ -68,6 +71,7 @@ QEMU_ARCH_arm64 = aarch64 QEMU_ARCH_arm = arm QEMU_ARCH_mips = mipsel # works with malta_defconfig QEMU_ARCH_ppc = ppc +QEMU_ARCH_ppc64 = ppc64 QEMU_ARCH_ppc64le = ppc64le QEMU_ARCH_riscv = riscv64 QEMU_ARCH_s390 = s390x @@ -82,6 +86,7 @@ QEMU_ARGS_arm64 = -M virt -cpu cortex-a53 -append "panic=-1 $(TEST:%=NOLIBC QEMU_ARGS_arm = -M virt -append "panic=-1 $(TEST:%=NOLIBC_TEST=%)" QEMU_ARGS_mips = -M malta -append "panic=-1 $(TEST:%=NOLIBC_TEST=%)" QEMU_ARGS_ppc = -M g3beige -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)" +QEMU_ARGS_ppc64 = -M powernv -append "console=hvc0 panic=-1 $(TEST:%=NOLIBC_TEST=%)" QEMU_ARGS_ppc64le = -M powernv -append "console=hvc0 panic=-1 $(TEST:%=NOLIBC_TEST=%)" QEMU_ARGS_riscv = -M virt -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)" QEMU_ARGS_s390 = -M s390-ccw-virtio -m 1G -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)" @@ -98,6 +103,7 @@ else Q=@ endif +CFLAGS_ppc64 = -m64 -mbig-endian -Wl,-EB,-melf64ppc -mmultiple -mno-vsx CFLAGS_ppc64le = -m64 -mlittle-endian -Wl,-EL,-melf64ppc -mno-vsx CFLAGS_s390 = -m64 CFLAGS_mips = -EL